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Node Jimp | scale
  • Last Updated : 22 Feb, 2021

Introduction : The scale() function is an inbuilt function in Nodejs | Jimp which uniformly scales the image by a factor.
 

Syntax: 

scale(scale, mode, cb)

Parameter: 

  • scale – This parameter stores the scaling factor of the image.
  • mode – This is optional parameter which stores the scaling method.
  • cb – This is optional parameter which is invoked when compilation is complete.

Input Images: 
 



 

Setup Environment : 

npm init -y

Install Dependencies :

npm install jimp 

Example 1: 
 

javascript




// npm install --save jimp
// import jimp library to the environment
var Jimp = require('jimp');
 
// User-Defined Function to read the images
async function main() {
  const image = await Jimp.read('
// scale Function having scaling factor as 0.2
  image.scale(.2)
  .write('scale1.png');
}
 
main();
  console.log('Image Processing Completed');

Output: 
 

Example 2: With mode and cb (optional parameters) 
 

javascript




// npm install --save jimp
// import jimp library to the environment
var Jimp = require('jimp');
 
// User-Defined Function to read the images
async function main() {
  const image = await Jimp.read('
// scale Function having scaling-factor, mode and callback function
  image.scale(3, Jimp.RESIZE_BEZIER, function(err){
    if (err) throw err;
  })
  .write('scale2.png');
}
 
main();
  console.log('Image Processing Completed');

Output: 
 

Reference: https://www.npmjs.com/package/jimp
 

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